
on some neighborhood \(\Omega _\mu ^\prime ,\Omega _\nu ^\prime \subset \mathbb {R}\)  with \(0\in \Omega _\mu ^\prime ,\Omega _\nu ^\prime .\) 
Using
the trace formulas ([1]}, Theorem 3.3)
\(\frac{iq}{2q_x}=(-1)^n\prod _{j=1}^n\mu _j,\quad \frac{ir}{2r_x}=(-1)^{n-1}\prod _{j=1}^n\nu _j,\) 
